Base frame of mini-stepper



FIG. 1 is a Top view.

FIG. 2 is a Bottom View.

FIG. 3 is a right side elevational view.

FIG. 4 is a left side elevational view.

FIG. 5 is a front, elevational view.

FIG. 6 is a rear, elevational view.

FIG. 7 is a front perspective view.

FIG. 8 is a rear perspective view; and,

FIG. 9 is a front perspective view, wherein the broken line showing of the upper portion of the mini-stepper is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a base frame of mini-stepper, as shown. 